. Canadian fisheries expedition, 1914-1915; Investigations in the Gulf of St. Lawrence and Atlantic waters of Canada. Fisheries -- Canada; Scientific expeditions. rWADIW /7N///:/.'//> 'EDITIOW IDlfi-lo 187 5. Clausocalanus arcuiconiis.—Previously recorded by Wheeler from the Gulf Stream. In the deep surface tow of Acadia station 74 there were very few copepods; out of a total of 25 counted, il were of this species, the others being C. finmarchicus III (5), IV (3), 9 (1); C. minor (2); minor (1), dance (1); Acartia sp. (1). 6. Pseudocalanus elongatus.—The abundance of this
. Canadian fisheries expedition, 1914-1915; Investigations in the Gulf of St. Lawrence and Atlantic waters of Canada. Fisheries -- Canada; Scientific expeditions. rWADIW /7N///:/.'//> 'EDITIOW IDlfi-lo 187 5. Clausocalanus arcuiconiis.—Previously recorded by Wheeler from the Gulf Stream. In the deep surface tow of Acadia station 74 there were very few copepods; out of a total of 25 counted, il were of this species, the others being C. finmarchicus III (5), IV (3), 9 (1); C. minor (2); minor (1), dance (1); Acartia sp. (1). 6. Pseudocalanus elongatus.—The abundance of this small but rich and oily species in the gulf of St. Lawrence is paralled by its frequency in the gulf of Maine. In the intervening stretch of water between the entrance to Cabot strait and to the bay of Fundy it does not occur in such great numbers. In the May plankton of the gulf of St. Lawrence between Prince Edward island and the Magdalen islands, it constituted on the average between eighty and ninety per cent of the copepod content. At several other stations inside the gulf if reached to 20 per cent and upwards. In none of the Acadia stations outside the gulf did it attain as much as 20 per cent, the nearest to this quantity being 17 per cent at station 67; 15 per cent at SO and 90; 14 per cent at In all the females which have come under my observation in the preserved material the ovisac was ruptured and the eggs appeared to be attached singly to the genital segment, sometimes one at a time, frequently two, rarely three. Often the shreds of the stalks of attachment are left behind after the egg has been liberated or torn away. When two eggs are present they may be seen to be attached separately side by side. Sometimes there will be one egg and the shrivelled stalk of another beside it. Sperma- tophores are sometimes applied to one and the same female in great numbers. In the example represented in fig. 6, I counted as many as twenty-four Fig. 6.
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